Sea lions naturally haul out of the water and rest on structures such as jetties and docks. They will also haul out into floating cages, which are used by wildlife biologists to capture these animals. In a typical operation, a biologist leaves the door to the trap open until one or more animals are inside, then trips the door shut.
Precautions are taken to ensure that no animals are inadvertently shut inside the cage traps. Doors to the traps are locked open to prevent them from closing accidently when the traps are unattended. The Corps has updated its surveillance systems at Bonneville Dam and monitors the entire area where the traps are set up.
14th of March, 2013